Related papers: Apercal -- The Apertif Calibration Pipeline

Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope

We describe the APERture Tile In Focus (Apertif) system, a phased array feed (PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed this telescope into a high-sensitivity, wide field-of-view L-band imaging and…

Instrumentation and Methods for Astrophysics · Physics 2022-03-14 W. A. van Cappellen , T. A. Oosterloo , M. A. W. Verheijen , E. A. K. Adams , B. Adebahr , R. Braun , K. M. Hess , H. Holties , J. M. van der Hulst , B. Hut , E. Kooistra , J. van Leeuwen , G. M. Loose , R. Morganti , V. A. Moss , E. Orrú , M. Ruiter , A. P. Schoenmakers , N. J. Vermaas , S. J. Wijnholds , A. S. van Amesfoort , M. J. Arts , J. J. Attema , L. Bakker , C. G. Bassa , J. E. Bast , P. Benthem , R. Beukema , R. Blaauw , W. J. G. de Blok , M. Bouwhuis , R. H. van den Brink , L. Connor , A. H. W. M. Coolen , S. Damstra , G. N. J. van Diepen , R. de Goei , H. Dénes , M. Drost , N. Ebbendorf , B. S. Frank , D. W. Gardenier , M. Gerbers , Y. G. Grange , T. Grit , A. W. Gunst , N. Gupta , M. V. Ivashina , G. I. G. Józsa , G. H. Janssen , A. Koster , G. H. Kruithof , S. J. Kuindersma , A. Kutkin , D. M. Lucero , Y. Maan , F. M. Maccagni , J. van der Marel , A. Mika , J. Morawietz , H. Mulder , E. Mulder , M. J. Norden , A. R. Offringa , L. C. Oostrum , R. E. Overeem , Z. Paragi , H. J. Pepping , E. Petroff , D. J. Pisano , A. G. Polatidis , P. Prasad , J. P. R. de Reijer , J. W. Romein , J. Schaap , G. W. Schoonderbeek , R. Schulz , D. van der Schuur , A. Sclocco , J. J. Sluman , R. Smits , B. W. Stappers , S. M. Straal , K. J. C. Stuurwold , J. Verstappen , D. Vohl , K. J. Wierenga , E. E. M. Woestenburg , A. W. Zanting , J. Ziemke

The latest on Apertif

We describe a Phased Array Feed (PAF) system, called Apertif, which will be installed in the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is, at frequencies from 1.0 to 1.7 GHz, to increase the instantaneous field of view…

Instrumentation and Methods for Astrophysics · Physics 2019-08-12 Tom Oosterloo , Marc Verheijen , Wim van Cappellen

Apertif - the focal-plane array system for the WSRT

We describe a focal plane array (FPA) system, called Apertif, that is being developed for the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is to increase the instantaneous field of view of the WSRT by a factor of 37 and…

Instrumentation and Methods for Astrophysics · Physics 2009-12-02 Tom Oosterloo , Marc Verheijen , Wim van Cappellen , Laurens Bakker , George Heald , Marianna Ivashina

First release of Apertif imaging survey data

(Abridged) Apertif is a phased-array feed system for WSRT, providing forty instantaneous beams over 300 MHz of bandwidth. A dedicated survey program started on 1 July 2019, with the last observations taken on 28 February 2022. We describe…

Instrumentation and Methods for Astrophysics · Physics 2022-11-23 Elizabeth A. K. Adams , B. Adebahr , W. J. G. de Blok , H. Denes , K. M. Hess , J. M. van der Hulst , A. Kutkin , D. M. Lucero , R. Morganti , V. A. Moss , T. A. Oosterloo , E. Orru , R. Schulz , A. S. van Amesfoort , A. Berger , O. M. Boersma , M. Bouwhuis , R. van den Brink , W. A. van Cappellen , L. Connor , A. H. W. M. Coolen , S. Damstra , G. N. J. van Diepen , T. J. Dijkema , N. Ebbendorf , Y. G. Grange , R. de Goei , A. W. Gunst , H. A. Holties , B. Hut , M. V. Ivashina , G. I. G. Jozsa , G. M. Loose , J. van Leeuwen , Y. Maan , M. Mancini , A. Mika , H. Mulder , M. J. Norden , A. R. Offringa , L. C. Oostrum , I. Pastor-Marazuela , D. J. Pisano , A. A. Ponomareva , J. W. Romein , M Ruiter , A. P. Schoenmakers , D. van der Schuur , J. J. Sluman , R. Smits , K. J. C Stuurwold , J. Verstappen , N. P. E Vilchez , D. Vohl , K. J. Wierenga , S. J. Wijnholds , E. E. M. Woestenburg , A. W. Zanting , J. Ziemke

Characterising the Apertif primary beam response

Context. Phased Array Feeds (PAFs) are multi element receivers in the focal plane of a telescope that make it possible to form simultaneously multiple beams on the sky by combining the complex gains of the individual antenna elements.…

Instrumentation and Methods for Astrophysics · Physics 2022-11-09 H. Dénes , K. M. Hess , E. A. K. Adams , A. Kutkin , R. Morganti , J. M. van der Hulst , T. A. Oosterloo , V. A. Moss , B. Adebahr , W. J. G. de Blok , M. V. Ivashina , A. H. W. M. Coolen , S. Damstra , B. Hut , G. M. Loose , D. M. Lucero , Y. Maan , Á. Mika , M. J. Norden , L. C. Oostrum , D. J. Pisano , R. Smits , W. A. van Cappellen , R. van den Brink , D. van der Schuur , G. N. J. van Diepen , J. van Leeuwen , D. Vohl , S. J. Wijnholds , J. Ziemke

Real-time searches for fast transients with Apertif and LOFAR

With the installation of a new phased array system called Apertif, the instantaneous field of view of the Westerbork Synthesis Radio Telescope (WSRT) has increased to 8.7$\,$deg$^2$. This system has turned the WSRT in to an highly effective…

Instrumentation and Methods for Astrophysics · Physics 2019-11-13 Yogesh Maan , Joeri van Leeuwen

Apertif 1.4 GHz continuum observations of the Bo\"otes field and their combined view with LOFAR

We present a new image of a 26.5 square degree region in the Bo\"otes constellation obtained at 1.4 GHz using the Aperture Tile in Focus (Apertif) system on the Westerbork Synthesis Radio Telescope. We use a newly developed processing…

Instrumentation and Methods for Astrophysics · Physics 2023-08-09 A. M. Kutkin , T. A. Oosterloo , R. Morganti , A. R. Offringa , E. A. K. Adams , B. Adebahr , H. Dénes , K. M. Hess , J. M. van der Hulst , W. J. G. de Blok , A. Bozkurt , W. A. van Cappellen , A. W. Gunst , H. A. Holties , J. van Leeuwen , G. M. Loose , L. C. Oostrum , D. Vohl , S. J. Wijnholds , J. Ziemke

APERTIF, a focal plane array for the WSRT

In this paper we describe a focal plane array (FPA) prototype, based on Vivaldi elements, developed for the Westerbork Synthesis Radio Telescope (WSRT) to increase its instantaneous field of view by a factor 25 and double its current…

Astrophysics · Physics 2009-11-13 M. A. W. Verheijen , T. A. Oosterloo , W. A. van Cappellen , L. Bakker , M. V. Ivashina , J. M. van der Hulst

An interference detection strategy for Apertif based on AOFlagger 3

Context. Apertif is a multi-beam receiver system for the Westerbork Synthesis Radio Telescope that operates at 1.1-1.5 GHz, which overlaps with various radio services, resulting in contamination of astronomical signals with radio-frequency…

Instrumentation and Methods for Astrophysics · Physics 2023-02-22 A. R. Offringa , B. Adebahr , A. Kutkin , E. A. K. Adams , T. A. Oosterloo , J. M. van der Hulst , H. Dénes , C. G. Bassa , D. L. Lucero , W. J. G. Blok , K. M. Hess , J. van Leeuwen , G. M. Loose , Y. Maan , L. C. Oostrum , E. Orrú , D. Vohl , J. Ziemke

The SPHEREx Image and Spectrophotometry Processing Pipeline

In this paper, we describe the SPHEREx image and spectrophotometry data processing pipeline, an infrastructure and software system designed to produce calibrated spectral images and photometric measurements for NASA's SPHEREx mission.…

Instrumentation and Methods for Astrophysics · Physics 2025-11-21 Rachel Akeson , Gregory P. Dubois-Felsmann , Brendan P. Crill , Andreas L. Faisst , Tamim Fatahi , Candice M. Fazar , Tatiana Goldina , Daniel C. Masters , Christina Nelson , Roberta Paladini , Harry I. Teplitz , Gabriela Torrini , Phani Velicheti , Matthew L. N. Ashby , Dan Avner , Yoonsoo P. Bach , James J. Bock , Sean Bruton , Sean A. Bryan , Tzu-Ching Chang , Shuang-Shuang Chen , Ari J. Cukierman , O. Dore , C. Darren Dowell , Spencer Everett , Richard M. Feder , Zhaoyu Huai , Howard Hui , Woong-Seob Jeong , Young-Soo Jo , Phil M. Korngut , Yuna G. Kwon , Bomee Lee , Gary J. Melnick , Giulia Murgia , Chi H. Nguyen , Milad Pourrahmani , Zafar Rustamkulov , Volker Tolls , Pao-Yu Wang , Yujin Yang , Michael Zemcov

Radio Continuum Surveys with Square Kilometre Array Pathfinders

In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (The Netherlands), ASKAP (Australia), eMERLIN (UK), VLA (USA),…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Ray P. Norris , J. Afonso , D. Bacon , Rainer Beck , Martin Bell , R. J. Beswick , Philip Best , Sanjay Bhatnagar , Annalisa Bonafede , Gianfranco Brunetti , Tamas Budavari , Rossella Cassano , J. J. Condo , Catherine Cress , Arwa Dabbech , I. Feain , Rob Fender , Chiara Ferrari , B. M. Gaensler , G. Giovannini , Marijke Haverkorn , George Heald , Kurt van der Heyden , A. M. Hopkins , M. Jarvis , Melanie Johnston-Hollitt , Roland Kothes , Huib van Langevelde , Joseph Lazio , Minnie Y. Mao , Alejo Martınez-Sansigre , David Mary , Kim McAlpine , E. Middelberg , Eric Murphy , P. Padovani , Zsolt Paragi , I. Prandoni , A. Raccanelli , Emma Rigby , I. G. Roseboom , H. Rottgering , Jose Sabater , Mara Salvato , Anna M. M. Scaife , Richard Schilizzi , N. Seymour , Dan J. B. Smith , Grazia Umana , G. -B. Zhao , Peter-Christian Zinn

Science with ASKAP - the Australian Square Kilometre Array Pathfinder

[ABRIDGED VERSION] The future of cm and m-wave astronomy lies with the Square Kilometre Array (SKA), a telescope under development by a consortium of 17 countries. The SKA will be 50 times more sensitive than any existing radio facility. A…

Astrophysics · Physics 2009-03-10 S. Johnston , R. Taylor , M. Bailes , N. Bartel , C. Baugh , M. Bietenholz , C. Blake , R. Braun , J. Brown , S. Chatterjee , J. Darling , A. Deller , R. Dodson , P. Edwards , R. Ekers , S. Ellingsen , I. Feain , B. Gaensler , M. Haverkorn , G. Hobbs , A. Hopkins , C. Jackson , C. James , G. Joncas , V. Kaspi , V. Kilborn , B. Koribalski , R. Kothes , T. Landecker , A. Lenc , J. Lovell , J. -P. Macquart , R. Manchester , D. Matthews , N. McClure-Griffiths , R. Norris , U. -L. Pen , C. Phillips , C. Power , R. Protheroe , E. Sadler , B. Schmidt , I. Stairs , L. Staveley-Smith , J. Stil , S. Tingay , A. Tzioumis , M. Walker , J. Wall , M. Wolleben

Science with the Australian Square Kilometre Array Pathfinder (ASKAP)

The future of cm and m-wave astronomy lies with the Square Kilometre Array (SKA), a telescope under development by a consortium of 17 countries that will be 50 times more sensitive than any existing radio facility. Most of the key science…

Cosmology and Nongalactic Astrophysics · Physics 2009-03-25 Simon Johnston , Ilana J. Feain , Neeraj Gupta

The Apertif Monitor for Bursts Encountered in Real-time (AMBER) auto-tuning optimization with genetic algorithms

Real-time searches for faint radio pulses from unknown radio transients are computationally challenging. Detections become further complicated due to continuously increasing technical capabilities of transient surveys: telescope…

Instrumentation and Methods for Astrophysics · Physics 2018-11-13 Klim Mikhailov , Alessio Sclocco

Scaling performance of the SAGECal calibration package: from LOFAR to SKA

This decade, the Square Kilometre Array (SKA) will perform its first observations. Preparations for building dishes, antennas, correlators and infrastructure are well underway. Concurrently, software for the processing of SKA observations…

Instrumentation and Methods for Astrophysics · Physics 2020-11-02 H. Spreeuw , S. Yatawatta , B. Van Werkhoven , F. Diblen

In-flight calibration of the Herschel-SPIRE instrument

SPIRE, the Spectral and Photometric Imaging Receiver, is the Herschel Space Observatory's submillimetre camera and spectrometer. It contains a three-band imaging photometer operating at 250, 350 and 500 {\mu}m, and an imaging Fourier…

Instrumentation and Methods for Astrophysics · Physics 2015-05-19 B. M. Swinyard , P. Ade , J-P. Baluteau , H. Aussel , M. J. Barlow , G. J. Bendo , D. Benielli , J. Bock , D. Brisbin , A. Conley , L. Conversi , A. Dowell , D. Dowell , M. Ferlet , T. Fulton , J. Glenn , A. Glauser , D. Griffin , M. Griffin , S. Guest , P. Imhof , K. Isaak , S. Jones , K. King , S. Leeks , L. Levenson , T. L. Lim , N. Lu , G. Makiwa , D. Naylor , H. Nguyen , S. Oliver , P. Panuzzo , A. Papageorgiou , C. Pearson , M. Pohlen , E. Polehampton , D. Pouliquen , D. Rigopoulou , S. Ronayette , H. Roussel , A. Rykala , G. Savini , B. Schulz , A. Schwartz , D. Shupe , B. Sibthorpe , S. Sidher , A. J. Smith , L. Spencer , M. Trichas , H. Triou , I. Valtchanov , R. Wesson , A. Woodcraft , C. K. Xu , M. Zemcov , L. Zhang

Science With The Australian Square Kilometre Array Pathfinder

The future of cm and m-wave astronomy lies with the Square Kilometre Array (SKA), a telescope under development by a consortium of 17 countries that will be 50 times more sensitive than any existing radio facility. Most of the key science…

Astrophysics · Physics 2009-11-13 Simon Johnston

The HERMES Calibration Pipeline: mescal

The HERMES Technologic and Scientific Pathfinder project is a constellation of six CubeSats aiming to observe transient high-energy events such as the Gamma Ray Bursts (GRBs). HERMES will be the first space telescope to include a siswich…

Instrumentation and Methods for Astrophysics · Physics 2024-02-07 G. Dilillo , E. J. Marchesini , G. Della Casa , G. Baroni , R. Campana , E. Borciani , S. Srivastava , S. Trevisan , F. Ceraudo , M. Citossi , Y. Evangelista , A. Guzmán , P. Hedderman , C. Labanti , E. Virgilli , F. Fiore

SAINT (Small Aperture Imaging Network Telescope) -- a wide-field telescope complex for detecting and studying optical transients at times from milliseconds to years

(Abridged) In this paper, we present a project of multi-channel wide-field optical sky monitoring system with high temporal resolution -- Small Aperture Imaging Network Telescope (SAINT) -- mostly built from off-the-shelf components and…

Instrumentation and Methods for Astrophysics · Physics 2023-12-05 Grigory Beskin , Anton Biryukov , Alexey Gutaev , Sergey Karpov , Gor Oganesyan , Gennady Valyavin , Azamat Valeev , Valery Vlasyuk , Nadezhda Lyapsina , Vyacheslav Sasyuk

Modeling and optimization of the antenna system with focal plane array for the new generation radio telescopes with wide field of view

The model of the reflector antenna system with focal plane array, low-noise amplifier and beamformer is developed in the work. The beamformer strategy is suggested to reduce the receiving sensitivity ripple inside field of view of the…

Instrumentation and Methods for Astrophysics · Physics 2016-02-16 O. Iupikov